<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="login_avatar">
        <img src="../assets/img/avatar.webp" alt="">
      </div>

      <!-- 表单区域 -->
      <el-form ref="loginFormRef" label-width='0px' class="login_form" :model="loginForm" :rules="loginFormRules">
        <!-- 用户名 -->
        <el-form-item prop='username'>
          <el-input prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input prefix-icon="iconfont icon-3702mima" v-model="loginForm.password" type="password"></el-input>
        </el-form-item>
        <!-- 提交按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入用户密码', trigger: 'blur' },
        ]
      }

    }
  },
  methods: {
    resetForm() {
      this.$refs.loginFormRef.resetFields()
    },
    login() {
      this.$refs.loginFormRef.validate(valid => {
        if (!valid) return;
        this.$http.post('/login', this.loginForm).then(res => {
          if (res.data.meta.status != 200) return this.$message.error('登陆失败')
          this.$message.success('登陆成功')
          //将登陆成功的token保存在浏览器的sessionStorage中
          //项目之外的api接口必须通过登陆之后才能访问
          //sesstionStorage中保存的token只在网页打开期间生效
          window.sessionStorage.setItem('token', res.data.data.token)
          //通过编程式的导航实现路由的跳转
          this.$router.push('/home')
        })

      })
    }
  }
}
</script>

<style  lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  background-color: #ffff;
  width: 450px;
  height: 300px;
  border-radius: 5px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  .login_avatar {
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #ffff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
    }
  }
}

.btns {
  display: flex;
  justify-content: flex-end;
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
</style>